diff --git a/rxjava-modules/rxjava-core-2/README.md b/rxjava-modules/rxjava-core-2/README.md
index 72c9fba62c..122f411256 100644
--- a/rxjava-modules/rxjava-core-2/README.md
+++ b/rxjava-modules/rxjava-core-2/README.md
@@ -3,3 +3,4 @@
 This module contains articles about RxJava.
 
 ### Relevant articles:
+- [RxJava Single.just() vs Single.fromCallable()](https://www.baeldung.com/rxjava-single-just-single-fromcallable)